Nanometer sized phase change materials for enhanced heat transfer fluid performance
AssigneeHRL Laboratories, LLC
InventorsLeslie A. Momoda, Amanda C. Phelps
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Abstract
A composition for enhanced heat transfer fluid performance, comprising a base heat transfer fluid and a nanometer sized phase change material. Introduction of nanometer sized phase change material into the heat transfer fluid leads to improved, high reversible thermal transport properties at elevated temperatures while ensuring low viscosity of the fluid at sub-freezing temperatures. A method for preparing of the heat transfer fluid with enhanced heat transfer performance, comprising making nanometer sized capsules having the phase change material contained therein and dispersing the capsules into the base heat transfer fluid.
Claims61
A composition for enhanced heat transfer fluid performance, comprising a base heat transfer fluid and a nanometer sized phase change material, said nanometer sized phase change material being dispersed in said base heat transfer fluid, wherein said base heat transfer fluid has a kinematic viscosity of not more than 14 cSt at −40° C., a boiling point of at least 80° C., and a flash point of at least 59° C. by Pensky-Martens method.
A composition for enhanced heat transfer fluid performance, comprising a base heat transfer fluid and a nanometer sized phase change material, wherein said nanometer sized phase change material is dispersed in said base heat transfer fluid, wherein said nanometer sized phase change material comprises capsules having an outer shell with the phase change material contained therein.
A method for preparing a heat transfer fluid with enhanced heat transfer performance, comprising:
- making capsules having an outer shell and a phase change material contained therein, said phase change material being selected from the group consisting of trimethylolethane, acetamide, monoaminopentaerythritol, 2-hydroxymethyl-2-methyl-1,3-propanediol, arachidic acid, behenic acid, and combinations thereof;
- and
- dispersing said capsules into a base heat transfer fluid, so that a ration between said capsules and said base heat transfer fluid is between about 0.1% and about 30% by volume.
A method for preparing a heat transfer fluid with enhanced heat transfer performance, comprising:
- making capsules having an outer shell and a phase change material contained therein;
- and
- dispersing said capsules into a base heat transfer fluid, so that a ratio between said capsules and said base heat transfer fluid is between about 0.1% and about 30% by volume, wherein said base heat transfer fluid has a kinematic viscosity of not more than 14 cSt at −40° C., a boiling point of at least 80° C., and a flash point of at least 59° C. by Pensky-Martens method.
A method for preparing a heat transfer fluid with enhanced heat transfer performance, comprising:
- making capsules having an outer shell and a phase change material contained therein, wherein said outer shell comprises alkylated polysiloxane;
- and
- dispersing said capsules into a base heat transfer fluid, so that a ratio between said capsules and said base heat transfer fluid is between about 0.1% and about 30% by volume.
A method for preparing a heat transfer fluid with anhanced heat transfer performance;
- comprising:
- making capsules having an outer shell and a phase change material contained therein, wherein said outer shell comprises hybrid metal-organic precursors having an oxoalkoxide ligand and a substituted hydrocarbon ligand, wherein said hybrid metal-organic precursors are cross-linked;
- and
- dispersing said capsules into a base heat transfer fluid, so that a ratio between said capsules and said base heat transfer fluid is between about 0.1% and about 30% by volume.
A method for preparing a heat transfer fluid with anhanced heat transfer performance, comprising:
- making capsules having an outer shell and a phase change material contained therein, wherein said outer shell comprises cross-linked amphiphilic block and/or graft co-polymers;
- and
- dispersing said capsules into a base heat transfer flued, so that a ratio between said capsules and said base heat transfer fluid is between about 0.1% and about 30% by volume.
Dependencies are inferred from the claim text.